123 research outputs found

    Paruşev, Şeyh Bedrettin üzerine kitap hazırlıyor

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    Taha Toros Arşivi, Dosya No: 169-169/A-Bedrettin Simav

    Kavga ozanı Nazım Hikmet:Çağdaş şiirimizin estetik, nitelik ve içerik düzeylerinde yol açıcısı

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    Taha Toros Arşivi, Dosya Adı: Nazım Hikmetİstanbul Kalkınma Ajansı (TR10/14/YEN/0033) İstanbul Development Agency (TR10/14/YEN/0033

    The Effect of Ethical Leadership Beh avior on Perceived Organizational Climate: Mediating Role of Work Loneliness

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    In this paper, the effects of ethical leadership behaviors on employees’ perceived organization climate and whether work loneliness plays mediation role in this relationship are researched. A questionnaire has been developed in accordance with study objectives and implemented to 166 employees of a textile company located in Istanbul. Cronbach's Alpha and McDonald's Omega analysis were used to examine the reliability of obtained data and it was seen that the scales are reliable. Structural Equation Modeling (Partial Least Square Method) and Sobel tests were used to test the hypothesis. As a result of analysis, it has been seen that ethical leadership has positive and significant effect on employees’ perceived organizational climate and work loneliness plays a partial mediation role in this relationshi

    Recurrent hydatidiform moles: detection of a new mutation in the NLRP7 gene in the family

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    Hydatidiform moles are the most common type of gestational trophoblastic neoplasia. Hyperproliferative vesicular trophoblasts and imperfect fetal development are abnormal pregnancies, and recurrent hydatidiform moles are rare. Mutations in NLRP7 are responsible for recurrent hydatidiform mole. Genetic heterogeneity has been demonstrated in patients with the NLRP7 mutation. This study presents our case with gravida 11, parity 0, histopathologically diagnosed with six hydatidiform moles and five missed abortion histories at age 35. Karyotype analyses of the unrelated couple were normal. A genetic examination revealed a novel mutation of the NLRP7 gene in the patient, his brother, and his parents. Detecting a new NLRP7 mutation in recurrent hydatidiform moles cases provides further evidence for the predetermined role of NLRP7 mutations in the pathophysiology of recurrent moles hydatidiform. Based on our findings, we hope to contribute to the literature by expanding the spectrum of recurrent pregnancy loss associated with NLRP7 mutations in patients

    Assessment of Subepithelial Angiogenesis in Acquired Cholesteatoma between Pediatric and Adult Patients

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    Objective:The aim of this study was to compare subepithelial angiogenesis developing within the perimatrix of the cholesteatoma between pediatric and adult patients.Methods:Sixty-one patients who underwent mastoidectomy for the first intent because of chronic otitis media with cholesteatoma between 1993 and 2013 and from whom appropriate tissue specimens were taken were included in the study. The patients were classified in the pediatric patient group if they were under the age of 18 years and the adult patient group if they were 18 years and older. Immunohistochemical staining for CD-31 was performed on new sections taken during surgery and sections prepared from archived tissues in paraffin blocks. Results were compared between the groups.Results:A total of 61 patients, of whom 25 were pediatric and 36 were adult patients, were included in the study. The mean CD-31 immunopositive microvessel rates were 8.8 (3-15) and 6.61 (2-14) for the pediatric and adult patient groups, respectively. The difference between the groups was statistically significant (p=0.037). Correlation analysis showed a statistically significant negative correlation between the CD-31 immunopositive microvessel rates and age (p=0.036).Conclusion:Subepithelial angiogenesis developing within the perimatrix of the cholesteatoma of the pediatric patients was more expressed than that of the adult patients

    Development of GİS/GPS/GPRS based truck dispach systems for open pit mines

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    Maden işletmelerinde, kazılarak açığa çıkartılan malzemenin kazı alanındantaşınması gerekmektedir. Kazılarak çıkartılan malzeme değerli ise işlenmek için,hazırlama tesisi veya kırıcıya gönderilir.Kazılarak çıkartılan malzeme değersiz ise pasa sahasına veya döküm sahasınagönderilmesi gerekmektedir. Maden işletmesindeki kazılı malzemenin taşınmasıişlemine, maden nakliyesi denilmektedir.Maden işletmesindeki malzeme taşıma maliyeti, işletme maliyetinin % 30 ”“ 45arsındadır. Hazırlamış olduğum bu tez, taşıma maliyetini düşürmek amacı ile yapılansistemleri ve bu sistemlerle ilgili yapılan çalışmaları anlatılmaktadır. Tez beş anabölümden oluşmaktadır.Birinci bölümde, maden işletmelerinde nakliyatın önemi, açık işletme ve kapalıocak maden işletmelerinde kullanılan malzeme taşıma yöntemleri, açık madenocaklarında kullanılan en yaygın taşıma yöntemi olan kamyon nakliyatı, kamyonnakliyatının avantaj ve dezavantajlarından bahsedilmektedir.İkinci bölümde, kamyon nakliyat sisteminin geliştirilmesine yardımcı olan GPSsisteminin ne olduğu, frekansları ve özellikleri, ölçüm sırsında oluşan hata kaynaklarıve çözüm yolları, GPS ile yapılan ölçüm türleri ve nokta hesaplama yöntemlerindenbahsedilmektedir.Üçüncü bölümde, kamyon atama sistemlerinin tarihçesi, kamyon atama sisteminintürleri, kamyon atama sisteminde araç seçim prosedürleri, yapılan kamyon atamasistemlerinin örnekleri ve uygulama yerleri ve gelecekte olması istenen sistemlerdenbahsedilmektedir. Dördüncü bölümde, kamyon atama sistemini geliştirmek amacı ile yapılansistemden ve hazırlanan devre, devre elemanları, yöntemlerden ve oluşturulan mantıksistemi ile oluşturulan bilgisayar programından, yapılan iki uygulama ve buuygulamaların sonuçları, çalışma mantıklarından bahsedilmektedir.Son bölümde, hazırlanan tezin amacı, elde edilen sonuçlar ve gelecekte yapılacakolan sistemlerin ne şekilde sonuçlanacağından bahsedilmektedir. The materials revealed by digging process must be carried from the excavationarea in open pit mines. If the materials in question are of value, they are sent topreparation or crusher plants.If the equipment is of no value, it must be transferred to tallow or moulding fields.Transportation process of excavated materials in open pit mines is called mineconveying.The cost of material transportation in open pit mines ranges from 30-45 % ofoperating expenses. In this paper, systems established and studies performed toreduce the cost are reported. The dissertation is composed of five major chapters.In the first chapter, the importance of transportation in mines, materialtransportation methods used in open and closed mine plants, truck industry which isone of the most common transportation methods employed in open mine plants, theadvantages and disadvantages of truck transportation are dealt with.In the second chapter, the use of GPS system providing aid for the development oftruck transportation system, its frequencies and attributions, error sources and theirsolution ways, measurement sorts carried out by GPS and position calculation deviceare referred.In the third chapter, the history of truck assigning systems, the kinds of truckassigning system, vehicle selection procedures in truck assigning system, theexamples regarding truck assigning system executed and their implementationlocations and systems which are demanded to be seen in the years to come arementioned. In the fourth chapter, the system carried out to develop truck assigning system andprepared circuit, the elements of circuit, methods and computer programmes createdby logic system, two performed applications and the outcomes of aforementionedapplications and logic of study underlying beneath it are dealt with.In the last chapter, the purpose of dissertation being written, the results obtainedfrom it and where the systems to be fulfilled in the years to come will lead to arediscussed

    Inverse laminoplasty for the treatment of lumbar spinal stenosis.

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    STUDY DESIGN: Fifteen patients with lumbar spinal stenosis were treated by a new technique, inverse laminoplasty, and the results were evaluated clinically and radiologically. OBJECTIVE: To present the advantages of inverse laminoplasty over laminectomy for the treatment of lumbar spinal stenosis. SUMMARY AND BACKGROUND DATA: Laminectomy has been used widely in the treatment of lumbar spinal stenosis. Destruction of the spinal bony structure, instability, and peridural scar formation are the main problems with this procedure. To overcome these disadvantages, a practical technique is presented here. MATERIAL AND METHODS: In a prospective study, 15 patients who underwent surgery with the inverse laminoplasty technique were evaluated clinically and radiologically. The Oswestry Disability Index was used for clinical assessment. L4-L5 spinal stenosis was detected in all patients. As the operative technique, the L4 lamina was elevated en bloc using a high-speed drill and rongeur. After removal of the ligamentum flavum, the roof of the foramina, and/or disc, the lamina was rotated 180 degrees, rested on facets, and reattached by use of a titanium miniplate. RESULTS: All patients improved clinically and neurologically after this procedure. The mean Oswestry Disability Score was 38.33 preoperatively and 7.0 postoperatively. The mean follow-up time was 17.3 months. Spinal canal diameters were calculated by preoperative and postoperative computed tomography, and the mean enlargement was 77.8%. No complications were observed. CONCLUSION: With this technique, the important integrity of the spinal osseous structures is preserved, and a significant enlargement of the spinal canal area is achieved. This technique prevents peridural scar formation after laminectomy caused by a mechanical barrier effect. Long-term follow-up is needed to evaluate spinal stability in these patients

    Thermal and Electrical Conductivity of Unsaturated Polyester Resin Filled with Copper Filler Composites

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    Thermal and electrical conductivity of unsaturated polyester resin with copper filler composite material are investigated both theoretically and experimentally. In the experiments, polyester matrix is combined with dendrite-shape copper to determine the effects of both filler size and content on thermal and electrical conductivity, respectively. It is observed that the increase in the concentration causes the thermal and electrical conductivity of composite mixture to grow up. It has also been observed that the both thermal and electrical conductivity increase with increasing filler particle size
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